First, let me describe the configuration I have been using successfully for two decades - I am on the latest release channel release with a POP3 configuration. I keep the message store on my file server and have Tbird installed on it and my laptop. The file server is a Win 11 machine as is my laptop. Each machine points to the message store (including the config file) on the file server. Of late, every time I try to use Tbird on the file server, I get "You have launched an older version" message. So far reinstalling and pointing to the existing message store works. But I am getting bored with having to reinstall every time, and I suspect this will eventually break completely. Is there a way to stabilize this? Thanks Jonathan